Apparatus for machining curved stereotypes.



W. E. BENNISON.

APPARATUS FOR MACHINING CURVED STEREOTYPES.

APPLICATION FILED NOV. 23, 1912.

Patented Sept. 12 1916.

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W. E. BENNISON. APPARATUS FOR MACHINING cuRvED STEREOTYPES. APPLICATION FILED NOV. 23. 1912.

1 1,1 98,389 Patented Sept. 12, 1916.

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UNITED STATES PATENT OFFICE.

WILLIAM EDWARD BENNISON, OF BROADIIEATI-I, ENGLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK,

N. Y., A CORPORATION OF VIRGINIA.

APPARATUS FOR MACHINING CURVED STEREOTYPES.

Application filed November 23, 1912.

T0 all 'whom it may concern:

Be it known that I, VILLIAM EDWARD BnNNIsoN, a subject of the King of Great Britain, residing at Linotype and Machinery IVOrkS, Broadhea-th, in the county of Chester, England, have invented a new and useful Apparatus for Machining Curved Stereotypes, of which the following is a specification.

The present invention is an improvement over a machine for finishing and cooling stereotype plates described in the Patent No. 1,134,7 98 of Henry A. Wise Wood, patented April 6, 1915, on an application Serial No. 454,972, filed Sept. 28, 1908. It is well known to all up-tO-date stereotypers, that a curved stereotype must have its concave face bored out exactly concentric with both its printing face and the cylinder of the printing press on which it is to be used. The said Wood case shows a stationary arch into which the stereotype is raised and clamped. Its concave face is bored while it is so clamped, after which it is unclamped and then lowered. But in that invention the arch is made narrower than a stereotype, the latter arcually longer than the former in order that the margins may project below the edges of the arch when the stereotype is clamped. It is also provided with means for (a.) gripping both sides of a stereotype and springing them toward each other while being raised into the arch, for (Zn) loosening them to allow them to spring back into contact with the respective sides ,of the arch as soon as the crown of the stereotype is up to the crown of the arch, for (c) again gripping and springing them toward each other as the stereotype is being lowered, and for (d) allowing them to spring back into their original position after the stereotype has been lowered. The object of this double springing is to prevent the type on the sides of the stereotype being rubbed against the sides of the arch.

The present invention consists in these gripping and loosing motions of the plate engaging jaws being independent of their rise and drop, and, at the same time, of being certain both as to time and extent; sec'- ondly, in their being adjustable as to position with reference to the axis of the stereotype, for the purpose of regulating the dis- Specicaton of Letters Patent.

Patented sept. 12, 19in.

Serial No. 733,089.

tance through which the stereotype-sides shall be sprung; and thirdly, in means for accomplishing those two objects.

A preferred constructional form is illustrated in the accompanying drawings in which- Figure 1 is a front sectional elevation; Fig. 2, a sectional detail side elevation from the right hand side of the said figure; and Fig. 3 is a detail section on enlarged scale of a preferred form of the apparatus, this figure showing the aw in a different position.

1, 1 are the side frames of the apparatus; 2, 2, the two series of rollers on which the stereotype 3 rests so long as it is under the arch 16; 6, a transverse driving shaft; 8, a worm on it; 10, a central longitudinal shaft driven in the direction indicated in Fig. 1 by the engagement of the worm 8 with a worm wheel 11 fast on said shaft; 21 and 22 the stereotype supports carrying one set of rollers 2 each; 23, 30, the two cams on the shaft 10 for raising and lowering the supports 21 and 22; 42, 42, the two sets of levers respectively fulcrumed at 43, 43 on the supports 21 and 22; and 44, 44, the jaws. The stereotype 3 is shown in both its positionsready to be raised into the arch 16, and clamped thereto after it has been raised. All the foregoing parts are as in the said Wood patent and some of them are marked with the same reference letters to facilitate identification, but the jaws 44 correspond 'to the jaws 58 of food and operate in the same way and for the same purpose. The cam 23 operates a cam roller 30a mounted on a lever 31 and connected with an arm 32 on a rock shaft 33. This rock shaft carries the gear segment 34 operating a vertically sliding rack 35 which carries a support 21 on one side of the machine on which one set of rollers 2 is mounted. In a similar way the cam 30 operates a rock shaft 37 on the other side of the machine which carries arms 38 connected by links 40 with a slidable member on which are mounted the rollers 2 on that side.

According to the preferred constructional form, 80 is an additional longitudinal shaft driven in the Adirection indicated in Fig. 1 by the engagement of the worm 8 with the worm-wheel 81 fast on the said shaft.

The

latter carries a grooved face-Cain 82v which embraces a roller S3 on a pivot pin 84 positioned in the median vertical plane of the apparatus and fitting as loosely as ,is necessary in the adjacent and overlapping ends of a pair of equal arms 85, one on each side of the pivot 84.

S6, S6 are a pair of rockshafts, one on each side of the cam S2, and turning in suitable bearings (not shown) in the main frame. The outer end of each arm 85 is fast to its shaft SG.

87 ris an arm fast to and 'upstanding from each shaft 86. The arms 85, rockshafts 86, and arms S7, are symmetrically arranged with reference to thel said plane. Each set of levers 42 is prolonged downward below its fulcrum 43 and the bottom ends of the set on each side of the apparatus, are connected by a link S8 to the top end of the respective arm S7, all the connections being pivotal. The shaft 80 turns at the same rate as the shaft 10 but in the opposite direction. As the roller 83 is embraced by a cam groove, both the springing and the springing-back motions of the jaws 44, are caused by the constant action of a cam surface upon that roller, thereby securing the desired certainty as to both time and length. The adjustability of the said jaws as to position with reference to the aXis of the stereotype 3, is attained by the tops and bottoms of the ends of each pivot 89 which connects a lever .42 to a link 88, being flattened and engaging in a transverse slot 90 in a lever 42, between the ends of two set screws 91, 91 working through the end of the said lever and bearing on the respective sides of the said pivot. Setting the pivots 89 nearer to or farther from the median vertical plane of the apparatus by the respective pair of set screws 91, effects the desired adjustment of the jaws.

Although I have illustrated and described only a single embodiment of the invention, I am aware of the fact that modifications can be made therein without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited to all the details of construction herein shown and described, but

What I do claim is 1. In a plate finishing machine, the combination of movable supports for the edges of a plate, means for moving said supports, and means operable independently of the position of said supports for springing the edges of the plate laterally while resting on said supports.

y 2. In a plate finishing machine, the combination of movable supports for the edges of the plates, means for raising and lowering said supports, and means independent of said raising and lowering means for positively springing the edges of the plate laterally at both sides while resting on said supports.

In a machine for finishing curved stereotype printing plates, the combination of an arch, means for moving the plates toward the arch, jaws for springing the edges of the plate so as to prevent them from rubbing against the arch, and means for posi.

of a plate, means for moving said supports,

and means independent of the moving means for springing the edges of the plates laterally while resting on said supports, said means comprising a shaft, a cam thereon independent of the means for moving said supports, and means connected with said cam for laterally moving the springing means.

6. In a plate finishing machine, the combination of a support for the edge of a plate, means for laterallyT moving the edge of a plate while on said support comprising a lever, having a downward prolongation, a rock shaft, an arm fast on said rock shaft, a link connecting said prolongation with said arm, another arm fast to said shaft and extending inwardly toward the median vertical plane of the machine, a pivot thereon, a roller carried by the pivot, and a cam for operating said roller.

7. In a plate finishing machine, the combination of movable supports for the edges of a plate, means for moving said supports up and down, means for gripping the edges of a plate on said supports and moving them inwardly, a cam, a pair of levers connected with said gripping means for moving them, each having a downward prolongation at the sides of said cam, a pair of rock shafts parallel with the axis of the cam, an arm fast on each of said rock shafts, a link connecting each of the said prolongations with one of said arms, another pair of arms fast to said shafts and extending inwardly toward the median vertical plane of the machine, said last named arms meeting and overlapping each other, and pivoted together, and a roller carried by the pivot and engaging in the groove of said cam.

8. In a plate finishing machine, the combination of movable supports for the edges of a plate, a cam, means for moving said supports, a pair of plate grippers, a pair of levers connected with said grippers for moving them, each having a downward prolongation at the sides of said cani and having a transverse slot, a pair of rock shafts parallel with the axis or' the cam, an arm fast on each of said rock shafts, and connected with said prolongations, another pair of arms fast to said shafts and extending inwardly toward the median vertical plane of the machine, a roller carried by the last named arms and engaging in the groove or' said cam, and adjusting means for said grippers comprising a reciprocating link for rocking said prolongations, a pivot pin in the end of the link and adapted to slide in said slot, and means for changing theposition of the pivot pin along the slot.

9. Ina machine for finishing curved stereotype printing plates, the combination of an arch, movable means for gripping the edges of the plate, means for moving said grippers toward and from the arch, means for adjusting said grippers laterally, and means independent of the adjusting means for moving the grippers laterally to spring the edges of the plates out of alinement With the sides of the arch.

10. In a plate finishing machine, the combination of a movable gripper for the edge or' a plate, means for moving said gripper comprising a lever having a transverse slot, a reciprocating link for rocking said leven, a pivot pin in the end of said link having opposite flattened surfaces to slide in said slot, and means for adjusting said pivot pin along the slot.

In testimony whereof I have hereunto set my hand, in the presence of tWo subscribing Witnesses.

WILLIAM EDWARD BENNISON.

l/Vitnesses t ERNALD SIMPSON MosELEY, MALCOLM SMETHURST.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents Washington, D. C. 

